Those prices sound in the ballpark for sure. It all depends on what the condition of the gear and rigging is in to be honest. If the sails have holes in them from mice, then I wouldn't pay a cent for the boat.
Usually soft spots form in the hull decks because the fiberglass-foam sandwich has been abused in some fashion. The fix involves drilling shallow holes into the deck, only through the top layer of fiberglass then clearing out some of the foam in the middle of the sandwich, then injecting epoxy resin into the holes. Hobie has a good diagram on their website.